Mike,
Yes, I have seen that. Like most of what one will see in the Blue Book, you should take it with a small pickup truck pinch/load of salt.
Specifics are rather hard to nail down. How long were they in business? Are they still? Were they bought by another maker? Where did the 250 quantity imported come from, which, seems suspect, just by the quantity owned or seen by guys on this board, alone.
It would be really nice if someone knew of a English speaking contact in Gardone, who actully knew something about the makers of that era.
Best,
Ted
